Natural Science CLEP Prep Practice Exam

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Prepare for the CLEP Natural Science Exam with our comprehensive study materials and practice questions. Test your knowledge and ace the exam by mastering key concepts.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

The operating principal of the greenhouse effect is

Sunlight reflects off of the Earth’s surface
Heat from the sun becomes trapped in the atmosphere
The Earth’s surface absorbs infrared radiation
UV rays increase the temperature of the atmosphere

The correct answer is: Heat from the sun becomes trapped in the atmosphere

The operating principle of the greenhouse effect is that heat from the sun becomes trapped in the atmosphere. The other options are incorrect as they do not describe the mechanism of the greenhouse effect. Option A mentions sunlight reflecting off the Earth's surface, which does not contribute to the trapping of heat. Option C mentions the Earth's surface absorbing infrared radiation, but does not explain how this leads to the greenhouse effect. Option D mentions UV rays increasing the temperature of the atmosphere, but UV rays are not the main cause of the greenhouse effect. Therefore, while these options may have some relation to heat and the atmosphere, they are not the main operating principle of the greenhouse effect.